diff --git a/core/templates/layout.base.php b/core/templates/layout.base.php
index d6d70f31362a2..9019f3782dbfe 100644
--- a/core/templates/layout.base.php
+++ b/core/templates/layout.base.php
@@ -18,15 +18,15 @@
 		<?php foreach($_['printcssfiles'] as $cssfile): ?>
 			<link rel="stylesheet" href="<?php print_unescaped($cssfile); ?>" media="print">
 		<?php endforeach; ?>
+		<?php foreach ($_['jsfiles'] as $jsfile): ?>
+			<script defer nonce="<?php p(\OC::$server->getContentSecurityPolicyNonceManager()->getNonce()) ?>" src="<?php print_unescaped($jsfile); ?>"></script>
+		<?php endforeach; ?>
+		<?php print_unescaped($_['headers']); ?>
 		<?php if (isset($_['inline_ocjs'])): ?>
 			<script nonce="<?php p(\OC::$server->getContentSecurityPolicyNonceManager()->getNonce()) ?>" type="text/javascript">
 				<?php print_unescaped($_['inline_ocjs']); ?>
 			</script>
 		<?php endif; ?>
-		<?php foreach ($_['jsfiles'] as $jsfile): ?>
-			<script nonce="<?php p(\OC::$server->getContentSecurityPolicyNonceManager()->getNonce()) ?>" src="<?php print_unescaped($jsfile); ?>"></script>
-		<?php endforeach; ?>
-		<?php print_unescaped($_['headers']); ?>
 	</head>
 	<body id="body-public">
 		<?php include('layout.noscript.warning.php'); ?>
diff --git a/core/templates/layout.guest.php b/core/templates/layout.guest.php
index 1692e4268d474..d3327529eb5d9 100644
--- a/core/templates/layout.guest.php
+++ b/core/templates/layout.guest.php
@@ -19,15 +19,15 @@
 		<?php foreach($_['printcssfiles'] as $cssfile): ?>
 			<link rel="stylesheet" href="<?php print_unescaped($cssfile); ?>" media="print">
 		<?php endforeach; ?>
+		<?php foreach($_['jsfiles'] as $jsfile): ?>
+			<script defer nonce="<?php p(\OC::$server->getContentSecurityPolicyNonceManager()->getNonce()) ?>" src="<?php print_unescaped($jsfile); ?>"></script>
+		<?php endforeach; ?>
+		<?php print_unescaped($_['headers']); ?>
 		<?php if (isset($_['inline_ocjs'])): ?>
 			<script nonce="<?php p(\OC::$server->getContentSecurityPolicyNonceManager()->getNonce()) ?>" type="text/javascript">
 				<?php print_unescaped($_['inline_ocjs']); ?>
 			</script>
 		<?php endif; ?>
-		<?php foreach($_['jsfiles'] as $jsfile): ?>
-			<script nonce="<?php p(\OC::$server->getContentSecurityPolicyNonceManager()->getNonce()) ?>" src="<?php print_unescaped($jsfile); ?>"></script>
-		<?php endforeach; ?>
-		<?php print_unescaped($_['headers']); ?>
 	</head>
 	<body id="<?php p($_['bodyid']);?>">
 		<?php include('layout.noscript.warning.php'); ?>
diff --git a/core/templates/layout.user.php b/core/templates/layout.user.php
index e9a9b042e07f0..ab065311f0105 100644
--- a/core/templates/layout.user.php
+++ b/core/templates/layout.user.php
@@ -26,15 +26,15 @@
 		<?php foreach($_['printcssfiles'] as $cssfile): ?>
 			<link rel="stylesheet" href="<?php print_unescaped($cssfile); ?>" media="print">
 		<?php endforeach; ?>
+		<?php foreach($_['jsfiles'] as $jsfile): ?>
+			<script defer nonce="<?php p(\OC::$server->getContentSecurityPolicyNonceManager()->getNonce()) ?>" src="<?php print_unescaped($jsfile); ?>"></script>
+		<?php endforeach; ?>
+		<?php print_unescaped($_['headers']); ?>
 		<?php if (isset($_['inline_ocjs'])): ?>
 			<script nonce="<?php p(\OC::$server->getContentSecurityPolicyNonceManager()->getNonce()) ?>" type="text/javascript">
 				<?php print_unescaped($_['inline_ocjs']); ?>
 			</script>
 		<?php endif; ?>
-		<?php foreach($_['jsfiles'] as $jsfile): ?>
-			<script nonce="<?php p(\OC::$server->getContentSecurityPolicyNonceManager()->getNonce()) ?>" src="<?php print_unescaped($jsfile); ?>"></script>
-		<?php endforeach; ?>
-		<?php print_unescaped($_['headers']); ?>
 	</head>
 	<body id="<?php p($_['bodyid']);?>">
 	<?php include('layout.noscript.warning.php'); ?>
diff --git a/lib/private/legacy/template.php b/lib/private/legacy/template.php
index 09e3d130f4961..0a29ae9fa009e 100644
--- a/lib/private/legacy/template.php
+++ b/lib/private/legacy/template.php
@@ -233,6 +233,9 @@ public function fetchPage($additionalParams = null) {
 			$headers = '';
 			foreach(OC_Util::$headers as $header) {
 				$headers .= '<'.\OCP\Util::sanitizeHTML($header['tag']);
+				if ( strcasecmp($header['tag'], 'script') == 0 and in_array('src', array_map('strtolower', array_keys($header['attributes']))) ) {
+					$headers .= ' defer';
+				}
 				foreach($header['attributes'] as $name=>$value) {
 					$headers .= ' '.\OCP\Util::sanitizeHTML($name).'="'.\OCP\Util::sanitizeHTML($value).'"';
 				}
